Move ExtensionCreator and ExtensionCreatorFilter into extensions namespace

BUG=134696, 117261


Review URL: https://chromiumcodereview.appspot.com/10665053

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@146134 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/extension_service_unittest.cc b/chrome/browser/extensions/extension_service_unittest.cc
index c48090a..eada4ca 100644
--- a/chrome/browser/extensions/extension_service_unittest.cc
+++ b/chrome/browser/extensions/extension_service_unittest.cc
@@ -99,6 +99,7 @@
 using extensions::APIPermission;
 using extensions::APIPermissionSet;
 using extensions::Extension;
+using extensions::ExtensionCreator;
 using extensions::ExtensionPrefs;
 using extensions::PermissionSet;